content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------
   * PaintScale.java
   * ---------------
   * (C) Copyright 2006-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 05-Jul-2006 : Version 1 (DG);
   * 31-Jan-2007 : Added getLowerBound() and getUpperBound() methods (DG);
   *
   */
  
  package org.jfree.chart.renderer;
  
  import java.awt.Paint;
  
  import org.jfree.chart.renderer.xy.XYBlockRenderer;
  
  /**
   * A source for <code>Paint</code> instances, used by the
   * {@link XYBlockRenderer}.
   * <br><br>
   * NOTE: Classes that implement this interface should also implement
   * <code>PublicCloneable</code> and <code>Serializable</code>, so
   * that any renderer (or other object instance) that references an instance of
   * this interface can still be cloned or serialized.
   *
   * @since 1.0.4
   */
  public interface PaintScale {
  
      /**
       * Returns the lower bound for the scale.
       *
       * @return The lower bound.
       *
       * @see #getUpperBound()
       */
      public double getLowerBound();
  
      /**
       * Returns the upper bound for the scale.
       *
       * @return The upper bound.
       *
       * @see #getLowerBound()
       */
      public double getUpperBound();
  
      /**
       * Returns a <code>Paint</code> instance for the specified value.
       *
       * @param value  the value.
       *
       * @return A <code>Paint</code> instance (never <code>null</code>).
       */
      public Paint getPaint(double value);
  
  }
  